Flock bed

a bed filled with flocks or locks of coarse wool, or pieces of cloth cut up fine.

See also: Flock

Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in classic literature ?
Through the opening in the wall she had seen the Imperial eagle; and upon the flock bed, faintly lighted from above, lay the form of an officer of the Guard.
After pipe was assembled at the site, girth welds were coated with FBE applied with portable spray equipment which included an induction heating coil and fluidized flock bed. After weld-joint coating had cooled, a top coat of epoxy-based polymer-concrete was applied with a roller.
From Flock Beds to Professionalism: A History of Index-Makers.